- drop `Plugin.can_handle_url` and `Plugin.priority`
- introduce `Plugin.matchers`
- implement `pluginmatcher` decorator
- automatically match url (on change) and store result
- update `Session.resolve_url`
- add and fix related tests

- update protocol plugins: akamaihd, dash, hds, hls, http and rtmp
- remove `plugin.parse_url_params`, update `plugin.parse_params`
- refactor DASH tests

Basic plugins do only have one URL regex, don't reference capture
groups, don't translate URLs and their `can_handle_url` is simple.

Update and fix URL regex patterns:
- remove unnecessary anchors and optional trailing wildcards
- optionally match https (scheme update is plugin responsibility)
- escape actual dots in hostnames and path file extensions
- fix subdomain (non-)capture groups (don't match anything)
- fix unnecessarily escaped characters
- simplify character sets
- improve readability (verbose and non-verbose patterns)

)

Plugins with only one URL regex which reference capture groups, but
don't translate URLs and their `can_handle_url` is simple.

Update and fix URL regex patterns:
- remove unnecessary anchors and optional trailing wildcards
- optionally match https (scheme update is plugin responsibility)
- escape actual dots in hostnames and path file extensions
- fix subdomain (non-)capture groups (don't match anything)
- fix unnecessarily escaped characters
- simplify character sets
- improve readability (verbose and non-verbose patterns)

…#3821)

Update plugins which have specific checks in their `can_handle_url`
classmethod. Make those plugins return no streams instead when the
specific checks would have returned False otherwise.

Also update plugins calling other plugins' `can_handle_url`.

Update and fix URL regex patterns:
- remove unnecessary anchors and optional trailing wildcards
- optionally match https (scheme update is plugin responsibility)
- escape actual dots in hostnames and path file extensions
- fix subdomain (non-)capture groups (don't match anything)
- fix unnecessarily escaped characters
- simplify character sets
- improve readability (verbose and non-verbose patterns)

…k#3821)

Plugins that use more than one URL matcher pattern.

Update and fix URL regex patterns:
- remove unnecessary anchors and optional trailing wildcards
- optionally match https (scheme update is plugin responsibility)
- escape actual dots in hostnames and path file extensions
- fix subdomain (non-)capture groups (don't match anything)
- fix unnecessarily escaped characters
- simplify character sets
- improve readability (verbose and non-verbose patterns)

Resolve deprecated plugins which are using the old
`can_handle_url(url)` and `priority(url)` methods.

Since the `Plugin` class doesn't implement the `priority` classmethod
with the NORMAL_PRIORITY return value anymore, the NORMAL_PRIORITY
gets set by the resolver if the method is missing on plugins which
implement `can_handle_url` and don't have the `matchers` list.

)

Plugins with only one URL regex which reference capture groups, but
don't translate URLs and their `can_handle_url` is simple.

Update and fix URL regex patterns:
- remove unnecessary anchors and optional trailing wildcards
- optionally match https (scheme update is plugin responsibility)
- escape actual dots in hostnames and path file extensions
- fix subdomain (non-)capture groups (don't match anything)
- fix unnecessarily escaped characters
- simplify character sets
- improve readability (verbose and non-verbose patterns)

…#3821)

Update plugins which have specific checks in their `can_handle_url`
classmethod. Make those plugins return no streams instead when the
specific checks would have returned False otherwise.

Also update plugins calling other plugins' `can_handle_url`.

Update and fix URL regex patterns:
- remove unnecessary anchors and optional trailing wildcards
- optionally match https (scheme update is plugin responsibility)
- escape actual dots in hostnames and path file extensions
- fix subdomain (non-)capture groups (don't match anything)
- fix unnecessarily escaped characters
- simplify character sets
- improve readability (verbose and non-verbose patterns)

…k#3821)

Plugins that use more than one URL matcher pattern.

Update and fix URL regex patterns:
- remove unnecessary anchors and optional trailing wildcards
- optionally match https (scheme update is plugin responsibility)
- escape actual dots in hostnames and path file extensions
- fix subdomain (non-)capture groups (don't match anything)
- fix unnecessarily escaped characters
- simplify character sets
- improve readability (verbose and non-verbose patterns)

Resolve deprecated plugins which are using the old
`can_handle_url(url)` and `priority(url)` methods.

Since the `Plugin` class doesn't implement the `priority` classmethod
with the NORMAL_PRIORITY return value anymore, the NORMAL_PRIORITY
gets set by the resolver if the method is missing on plugins which
implement `can_handle_url` and don't have the `matchers` list.